code: def minmax1_scaler(x, x_min, x_range):
      x = (x - x_min) / x_range
      z = x * (2) - 1
      return z
  
imports: import torch
  import torch.nn
label_desc: Use image node_id 7 for calling a global function with example usage: minmax1_scaler(x, x_min, x_range) and returns: z